Storage battery.



W. A. PRINCE.

STORAGE BATTERY.

APPLICATION IILED'FEBA, 101s.

Patented'Aug. 12, 1913.

fig5552525 a gg , features of WALLACE A. PRINCE, OF QUINCY,

PATENT @FFKCE.

MASSACHUSETTS, ASSIGNOR T0 JOSEPH C. KENT,

TRUSTEE, OF CAMBRIDGE, MASSACHUSETTS.

STORAGE BATTERY.

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Specification of Letters Patent.

Patented Au. 12,1913.

Application filed February 4, 1913. Serial No. 746,118.

Automobile storage batteries used in connection with electric self-starters are subject to heavy momentary discharges with the result that the heavy drafts of current cause premature deterioration of that. portion of the grid adjacent to the lug, such deterioration being effected by the lead peroxid which attacks the antimony of the antimony-lead compound employed in grids and leaves the grid"pomus iir-t-lie icinity oiithe lug.

lnordcr to overcome this defect, 7'; provide the positive grid with two lugs arranged at opposite corners of the frame and provide extra conducting ribs extending downuuirdly from the lugs toward crossribs, the effect of this construction being to equalize the current density in the various portions of the grid.

My invention also comprises various other construction hereinafter more fully described and claimed.

My invention will be described in connection with the drawings which accompany and form a part of this specification and illustrate one embodiment thereof which has been found to give good results in practice; although it will be understood that I do not limit myself to the exact structure shown, inasmuch as the same may be widely varied without departing from the principle ofmy invention.

In the drawings,

Figure l is a side elevation of a .grid embodying my invention;

Fig. 9. is 'a plan view of a.sec0ndary battery provided with such grids. Fig. 3 is a plan view of two such batteries having their poles electrically connected. Fig. 4 is a sectit .11 taken on the line 44 of Fig. 2.

In the particular drawings selected for more fully disclosing my invention, 1 is a grid comprising as shown a rectangular frame of suitable material such as leadantimony compound and having longitudi- .connected in circuit through nal ribs 2 and lateral ribs 3 of the usual well known construction for holding active material in place. 4, 4 represent lateral ribs of larger dimensions than the ribs 3 arranged as shown, so as iractically to divide the grid in three equal parts. Cross-ribs 5, 5 extend diagonally upward from the lower corners of the frame and in the present instance terminate in the vicinity of the lower ends of the extra contacting ribs 6, 6 extending downwardly from the top of the grid. The upper corners of the grid are reinforced as shown at 7, 7 and such reinforcements terminate in the lugs 8, 8.

As will be obvious, the cross-ribs 5, 5 actas conductors and cause a higher current density in the upper port-ion of the grid, and to accommodate such increase of current, the extra ribs (3, 6 and reinforcing portions 7, 7 are provided. In practice, a one-lug grid employed with automobile self-starters shows little or no deterioration in the lower corners, buLLhanejonnd incpracflcenthat my improved grid oxidizes at approximately the same rate in all parts thereof, even when a current output as high as two hundred am-' peres is required for a few seconds from a battery designed to give twentpfive amperes.

In Fig. 2, .3 represents the battery jar containing positive plates P and negative plates N. The negative plates are provided with central lugs connected together by the connecting bar 12 provided with a pillar 13 about midway between its ends. The pairs of lugs 8, 8, of the positive grids are connected, respectively, by the connecting bars 10, each of which is provided with centrally located pillars 11. The mode of connecting the several bars is shown in Fig. 3, in which 14, 14 represent forked conducting members having their ends bored to receive the pillars 11, 11. which are electrically connected through the bars 10, 10 with the positive grids, and the pillar 13 which .is electrically connected with the negative grids through the bar 12. The pillar 13 of one of the terminal cells may be the straight connector 15. By means of the forked connctors of thecharacter shown. I eliminateall danger of short-circuiting the positive and negative plates through the pillars 11, 13, such short-circuiting being liable to oc cur if the pillars 11, 11 were cross-connected verse ribs for holding the active material,

.. cross-ribs extending extra conducting wardly from such ribs extending downreinforced parts, and

diagonally from the lower corners of the frame to points adjacent to the lower ends of said extra ribs. 2. A positive grictfor a storagehattery of the pasted-grid type having a lug at each of the upper corners thereof, means for holding 'the active material, conducting ribs extending downwardlyfrom said lugs and crossribs extending diagonally from the lower corners of the frame and terminating in the vicinity of the lower ends of said conducting ribs.

3. A positive grid for a storage battery of the pasted-grid type, comprisingflribs for holding the active material, extra conduct ing ribs extending downwardly, and cross- 7 Copies of this patent maybe obtained for ribs extending diagonally from the lower corners of the grid to points adjacent to the lower ends of said extra ribs. 4. A positive grid for a storage battery of the pasted-grid type, comprising aframe' having a lug at each of the upper corners thereof, ribs for holding the active material, extra conducting ribs extending downwardly from said lugs, and cross-ribs ex- 40 tending diagonally from the lower corners of the grid to points adjacent to the lower ends of said extra ribs. -5. A positive grid for a storage batteryof the pasted-grid type, comprising a frameas having a lug at each ofthe upper corners thereof, the parts-at which the lugs are attacherltothe frame being enlarged or reinvforced, ribs for holding the active material,

extra conducting ribs. extending downwardly from such reinforced parts, and

cross-ribs extending diagonally from the lower corners of the frame to points adjacent to the lower end of said'extrai ribs.

In testimony whereof, I have hereunto 35 subscribed'myname this 3rd day of Febru- I ary 1913.-

WALLAoiiiA. PRINCE.

' Witnesses:

G O. K. Wooowoirrrr, E. B. .Tolvnimson.

five cents each,.by addressing the Commissioner of Patents.

Washington, D. C." 

